A printed circular‐ring monopole antenna with band‐notched feature for UWB application

Abstract

The proposed novel p-shaped microstrip antenna with a shorting pin is constructed and measured for the dual-band (5.2/ 5.8 GHz) WLAN band, and then RL is measured using an Agilent N5230A vector network analyzer. Its far-field patterns and gain are measured inside a possible compact range at Incheon University TIC, Korea.Both the simulated and measured RLs of the p-shaped dualband antenna with a shorting pin are shown in Figure 2. The measurement ranges are 5. 147-5.358 and 5.712-5.826 GHz, which reached $211 and 114 MHz, respectively, thus covering the 5.2/5.8 GHz band for WLAN systems (RL < À10 dB). Figure 3 presents the simulated RLs for the proposed pshaped dual-band antenna with and without a shorting pin. The simulated result with a shorting pin has a wider band than the simulated result without a shorting pin. The ranges are 5.120-5.362 and 5.718-5.885 GHz, which reached 242 and 167 MHz (RL < À10 dB), respectively. Figure 4 presents the measured RPs of the E-plane and the H-plane, respectively. The RPs are measured from 5.1 to 5.9 GHz. The green and black lines represent the RPs at 5.25 and 5.80 GHz, respectively. The 3-dB beamwidth (half-power bandwidth) in the E-plane and H-plane is 82.23 and 84.55 at 5.25 GHz. Thus, good RPs are obtained in the dual-band WLAN bandwidth. Figure 5 shows the simulated and measured antenna gain for the operating frequencies across the dual-band WLAN band (5.2/5.8 GHz) where the gain of 5.73-6.52 dBi is obtained. CONCLUSIONSIn this article, a novel p-shaped dual-band microstrip patch antenna with a shorting pin for dual-band WLAN (5.150-5.350 and 5.725-5.825 GHz) was designed, fabricated, and tested. The impedance bandwidths were 211 (5.147-5.358 GHz) and 114 MHz (5.712-5.826 GHz), covering the required WLAN bandwidth (5.2/5.8 GHz). The gain obtained from 5.73-6.52 dBi matched the wireless LAN specifications. The radiation characteristics of the proposed antenna were also observed. The results demonstrate that the proposed novel p-shaped dual-band microstrip patch antenna with a shorting pin can be applied to dualband WLAN systems (5.2/5.8 GHz).ABSTRACT: A printed circular-ring monopole antenna with bandnotched feature for ultra-wideband application has been presented and investigated. The band-notched characteristic is achieved by attaching a C-shaped short-circuited stub. Experimental results show that the proposed antenna meets the requirement of wide-working bandwidth of 3.1-10.6 GHz with voltage-standing wave ratio <2, while avoiding the interference with the 5 GHz wireless local area network band. Transfer functions of the antenna systems are given experimentally, and the parametric studies are performed numerically in this article.ABSTRACT: We proposed a compact microstrip band-pass filter with wide stopband in this article. Microstrip gap and interdigital capacitor combine with stub inductors shorted to the ground plane by via were used to take advantage of different aspects of left-handed behavior to achieve compact size and wide stopband characteristics. The design...

Modified three‐circular‐ring monopole antenna for WiMAX/WLAN triple‐band operations

“…Among these antennas, printed monopole antennas play an important role due to their attractive features of a simple structure, a low profile, and a reasonably good performance. Especially, studies on the circular‐ring monopole antenna have been conducted . The circular ring, printed monopole antenna , and M shape surrounded by a ring monopole for wideband operations have been suggested.…”

“…The circular ring, printed monopole antenna , and M shape surrounded by a ring monopole for wideband operations have been suggested. Also, the band‐notched circular‐ring monopole antenna , the CPW dual‐ring loop antenna for dual‐band operation , and the ring monopole UWB antenna with a band notch have been proposed. Conversely, the ring monopole antenna with double‐coupled C‐shaped strips and a dual‐band ring‐shaped antenna for WiMAX/WLAN application have been studied.…”

Comparison of performance of compact ring printed monopole and loop antennas for wireless‐implantable body area network applications

“…An implantable antenna (to be implanted into a human body) is required to have a compact size and better performance compared to the antenna operated in free space environments . As previously reported , printed monopole antenna and printed loop antenna have such attractive advantages as compactness, small size, omnidirectional radiation patterns, large bandwidth (BW), and high‐radiation efficiency.…”

A Circular-Ring Monopole Antenna with a Half-Circular Ring and Ground Slot for WLAN/WiMAX Triple-Band Operations

“…This proposed antenna is made of expensive materials, unlike the conventional FR4 materials. The circular-ring, printed monopole antenna [13], the M-shaped antenna surrounded by a ring monopole [14] for wideband operations, the band-notched circular-ring monopole antenna [15][16][17], the CPW dual-ring loop antenna for dual-band operation [18], the ring monopole UWB antenna with a band notch [19] and the compact-ring monopole antenna for Wi-BAN [20], and the CPW-fed circular-ring monopole with an inverted T-strip line for dual-band operation [21] have already been proposed. In this study, a novel microstrip-fed monopole antenna for WLAN and WiMAX band applications was designed.…”

“…Among printed monopole antennas, the circular-ring monopole antenna [5][6][7][13][14][15][16][17][18][19][20][21], the ring monopole antenna with double-coupled C-shaped strips [5], the dual-band ringshaped antenna [6], and the ring monopole antenna with a defected ground plane [7] for WiMAX/WLAN application have been studied. In particular, the double-coupled C-shaped strips [5] antenna is designed and fabricated at a substrate with a relative permittivity of 2.65.…”